Here is a quick demo of video mapping software. What you are seeing is a video projection from a projector that is off-axis. This projector is laying at an irregular angle because it is propped up on a wadded up sweater. With the use of software correction, we are able to map multiple images onto dissimilar and off-angle surfaces. Geometry for off-axis in any orientation is corrected for in software.
These tools can be applied to all manner of mixed irregular surfaces. We can also apply tools that will project from multiple angles, and integrate with motion tracking, and control systems. If you can imagine it, it can be video mapped and tracked!